Debian 11 DSA-5265-1 Critical: Tomcat9 Concurrency Issue

Several security vulnerabilities have been discovered in the Tomcat
servlet and JSP engine.

CVE-2021-43980

The simplified implementation of blocking reads and writes introduced in
Tomcat 10 and back-ported to Tomcat 9.0.47 onwards exposed a long standing
(but extremely hard to trigger) concurrency bug that could cause client
connections to share an Http11Processor instance resulting in responses, or
part responses, to be received by the wrong client.

CVE-2022-23181

The fix for bug CVE-2020-9484 introduced a time of check, time of use
vulnerability into Apache Tomcat that allowed a local attacker to perform
actions with the privileges of the user that the Tomcat process is using.
This issue is only exploitable when Tomcat is configured to persist
sessions using the FileStore.

CVE-2022-29885

The documentation of Apache Tomcat for the EncryptInterceptor incorrectly
stated it enabled Tomcat clustering to run over an untrusted network. This
was not corr...